Cash register



6, 1942- D. K. HUGHES 2,297,961

CASH REGISTER Filed Aug. 25, 1938 7 Sheets-Sheet 1 Daniel K. HughesInventor His Attorney '7 Sheets-Sheet 2 roe O a 3 m o w m, 3 u r v. 0% OQ, v0 P m 5 w K. m m M 3 .m A 4| 8 .u Z 4 D J W Z l/Ill w M x, w m.

1942- D. K. HUGHES 2,297,961

CASH REGISTER Filed Aug. 25, 1938 7 Sheets -Sheet s Daniel K. HughesInventor Hi0 Attorney 06h 42- D. K. HUGHES 2,297,961 I I CASH REGISTERFiled Aug. 25, 1938 7 Sheets-Sheet 4 Daniel K. Hughes Inventor HisAttorney Oct. 6, 1942. D, HUGHES 2,297,961

CASH REGISTER Filed Aug. 25, 1938 '7 Sheets-Shqet 5 FIG. 15

Daniel K. Hughes Inventor His Attorney Oct. 6, 1942. D. K. HUGHES CASHREGISTER Filed Aug. 25, 1958 '7 Sheets-Sheet 6 Daniel K. Hughes InventorY M M Hit Attorney c 6, 1942- D. K. HUGHES 2,297,961

CASH REGISTER Filed Aug. 25, 1938 '7 Sheets-Sheet 7 Daniel K. HughesInventor His Attorney Patented Oct. 6, 1942 CASH REGISTER Daniel K.Hughes, Dayton,

Register Company, Dayton,

National Cash Ohio, a corporation of Application August 25, 1938, SerialNo.'226,690 Claims. (01. 101-96) This invention relates to cashregisters and like machines, and is more particularly concerned withprinting mechanism employed therein to record transaction data andtotals thereof.

One object of the present invention is to provide novel mechanismwhereby the printing hammer will be actuated more forcibly during totalprinting operation which involve more type wheels than are normally usedin printing data concerning transactions.

Another object of the invention is to provide simple and novelinterlocking mechanism to prevent more than one of two totalizers frombeing reset to zero at one operation, and to prevent a totalizer frombeing reset to zero unless the total standing thereon has been printed.

Another object of the invention is to provide mechanism to enforce thecompletion of a total printing operation once it has been begun.

Another object of the invention is to provide mechanism to prevent theoperator from disabling the printing hammer after a printing operationhas been commenced.

The mechanism. anlmprovement to that disclosed in United States LettersPatent No. 1,870,- 004, issued to Charles W. Green, and. United StatesLetters Patent No. 1,742,701, issued to Frederick L. Fuller, isdisclosed as applied to a cash register of the general type described inUnited States Letters Patent No. 2.0313160, issued to Bernis M.Shipley,to which patents reference is made.

With these and incidental objects in view, the

' invention includes certain novel features of construction andcombinations of parts, the essential elements of which are set forth inappended claims and a. preferred form or embodiment of which ishereinafter described with reference to the drawings which accompany andform a part of this specification. I

Of said drawings:

Fig. l is a frontfelevation of the machine with the cabinet removed andparts broken away, showing the key tips diagrammatically alined withtheir respective keys.

Fig. 2 is a vertical section through the ma- Ohio, asslgnor to TheMaryland Fig. 4 is a side elevation of the printing mechanism as viewedfrom the left.

Fig. 5 is a facsimile of a record strip produced by the machine, showingsample transactions.

Fig. 6 is a detail, showing the full stroke mechanism and the driveshaft.

Fig. 7 is a side elevation of the record strip storage and feedingmechanism as viewed from the right.

Fig. 8 is a vertical section from front to rear through the middleportion of the printing mechanism as viewed from the left.

Fig. 9 shows the manual control lever for con 7 ditioning the machinefor selected operations.

Fig. 10 is a side elevation of the totalizer resetting mechanism. asviewed from the right,

showing the interlock mechanism for preventing glare than'one totalizerfrom being reset at one .Fig. 11 shows the mechanism of Fig. 10 asviewedfrom the front of the machine.

Fig; 12 is a side elevation, as viewed from the right, of the interlockpreventing a total printing operation during a resetting operation andpreventing a resetting operation during a total printing operation.

Fig. 13 shows a totalizer type wheel and its reset pawl in relation tothe reset shaft.

Fig. 14 is a detail, showing the mechanism for forcing a completeoperation of the printer before it may be returned to home position.

Fig. 15 is a detail, showing the release key mechanism.

Fig. 16 is a. detail, showing the full stroke mechanism for the resetlever.

chine, viewed from the right of the ten, cent key bank looking to theleft, with the cabinet removed and parts broken away, showing thedifferential means for setting th printing wheels. 7

Fig. 3 is a detail. showing the means for lateral transmission of themovement, of the differential actuators for setting the ten centprinting wheels, as viewed from the front, to show the side spacingthereof. 9

segments for setting to what is known in the art as a Fig. 17 is asection through the machin immediately to the right of the left frameplate with some of the parts broken away.

Fig. 18 is a detail, showing the lid lock and the dual control thereof.

Figs. 19 and 20 are details, izer engaging mechanism.

GENERAL DESCRIPTION showing the total- The novel mechanism embodyingapplicant's invention isv shown in this disclosure as applied key leveroperated type of cash register.

The disclosed cash register is equipped with keys, a key; coupler,difierential members controlled by' the keys,

the type differentially, all of well known construction. These variouselements, though broadly old in the art, will be portion of a typical 7transmission elements, andbriefly described for the purpose of showingone embodiment of the invention, although it is to be understood themechanisms constituting the invention can be applied to other machines.

The indicator and receipt printing mechanisms, of the particular machinedescribed herein, have not been illustrated because they are notnecessary to an understanding of the invention although it is well knownthat in such machines it is the custom to use the same differentiallysettable members to set indicator and receipt printing mechanisms aswell as the record strip printing mechanism.

Framework The framework of the machine consists of a plurality ofvertical frame plates, namely the left frame plate 26! (Figs. 1 and 2),the right frame plate 202 (Fig. 1) and the rear frame plate 2112 (Figs.1 and 2), joined together by a cross rod 26 (Figs. 1 and 2) and variousjournaled shafts to be later described.

Keyboard As shown in Fig. 1 the machine is equipped with banks ofdepressible operating keys denominated from left to right, the "clerkkeys 24, the transaction" keys 26, the "dollar" keys 26, the "ten centkeys 21; and the "cent keys 26. The single "release" key 22 is providedfor actuating the mechanism for restoring partially de pressed keys.

This particular keyboard may be used to register amounts from one centto three dollars and ninety nine cents but, as will be evident, anyarrangement of keys may be used without affecting the application oroperation of the printing mechanism which is the subject of thisinvention.

All of the keys, one of which is represented by a ten cent key 21 (Fig.2), are pivotally mounted on rod 26 (Figs. 1 and 2) which is secured inthe frame plates 2M and 262. The forward ends of the keys, bearingdesignating tips (Fig. l), are adapted to be pressed down so as to causethe rear ends of the keys so pressed to rise, the axis of rod 29 (Fig.2) acting as a center.

Key coupler A key coupler 26 (Figs. 1 and 2) loosely mounted on shaft22, which is joumaled in the frame plates 2M and 202, rests across allof the keys and by its weight normally retains the keys in the positionshown in Fig. 2. The key coupler also functions in the usual manner toprovide for the simultaneous operation of a plurality of keys, whereby anumber of keys may be conditioned to operate by being hooked to saidcoupler and the machine finally operated by a complete operation of oneof the hooked keys. In such an operation the key coupler is rocked,carrying with it, to complete their action, all the keys thereon hooked.

As key 21 (Fig. 2) is partially depressed at the forward end, acounter-clockwise movement is given it around the axis of rod 22 as acenter, which movement rocks key coupler 26 in a like manner. The rod 26and shaft 22 are so positioned that continued movement of the key causesthe resilient edge 22 of the key coupler to engage beneath the shoulder26 on the depressed key lever, and in front of the shoulders 24 of theundepressed keys. A full stroke mechanism, to be described, prevents thekey coupler from returning to home position at this time. Keyssubsequently partially depressed are hooked onto the raised key coupler,such being made possible by the resilient edge 28. By means well knownin the art, described in the Shipley Patent 2,031,860,

only one key in a given key bank may be depressed at one transaction.Therefore by providing individually mounted resilient edges 22 (Fig.2),on the key coupler, for each bank of keys, the possibility of releasinga hooked key, by depressing another key in the same bank, is avoided.After all the keys pertinent to the data to be registered have beenhooked on the key coupler, any one of such keys, except those having anundercut 64 (Fig. 17), may be used to force the key coupler to completethe first half of its oscillatory movement, after which the weight ofthe key coupler returns the keys to normal position completing theoscillatory movement of the key coupler, and completing the registeringof the transaction. Keys having the undercut 54 may be provided if it isdesired that they shall not be used to complete a machine operation, butshall be effective only to raise the key coupler a short distance soother keys may be hooked on. When such undercut key is operated, therear edge of the key coupler jams against shoulder 65. When the keycoupler is rocked the undercut key is carried with it having been hookedover the resilient edge before jamming.

Full stroke mechanism Loosely mounted on the right end of the keycoupler shaft 22 is a lever 26 (Figs. 1 and 6) which, being fastened bypin 66 to the key coupler, is rocked first counter-clockwise as seen inFig. 6, as a key is depressed, and then clockwise, as the key returns tohome position. This rocking motion of lever 25, caused by theoscillation of the key coupler, is used to turn a drive shaft 26 (Figs.2, 4, 6, 8, and 17) one complete rotation for every machine operation,through pinion 21 (Fig. 6) secured on shaft 26, and rack 26, pivotallymounted on the lever 26 by stud 22. On the counter-clockwise movement oflever 26, the rack 26 is forced upwardly and rearwardly with the teeth40 of rack 26 held in contact with the pinion 21 by means of a nose llbearing on a guide 42 against which it rests until the completion of thecounter-clockwise motion of lever 25. During the first part of thecounter-clockwise motion of the lever 25, a spring 62 tends to turn therack 36 counter-clockwise around the stud 29, but before thecounter-clockwise motion of the lever 25 is finished the stud 26 passesthe line of pull of spring 42 and the spring tries to turn rack 26clockwise. As the nose 6i passes beyond the front slope of the guide 42it will snap over the end thereof under the action of spring 42 just asthe key coupler reaches the end of its counter-clockwise movement. Then,during the return movement of the rack 26, the nose 4| following thecontour of guide 62 bears against its rear side and causes teeth 46 toen-' gage pinion 21, as the lever 26 and the key coupler turn clockwise,causing the pinion 21' and shaft 26 to turn the remaining half of itscomplete rotation. A saw toothed ratchet wheel 45. secured to shaft 26,is engaged by a pawl 46 allowing the shaft 26 to turn in acounter-clockwise direction only, consequently requiring completion ofevery commenced operation of the machine.

Key release Because the key coupler raised by a partial depression of akey is not allowed to return to home'position by reason of the ratchetwheel 46 and pawl 46, it would be impossible, without a releasemechanism, to correct a mistake caused by hooking the wrong keys ontothe key coupler. To allow such corrections to be made, the release key23 (Figs. 1 and is provided to disengage pawl 46 (Figs. 6 and 15) fromratchet 46 at any time before the key coupler is raised sufflciently tooperate the registering mechanism.

Key 26 (Fig. 15) is pivotally mounted onstud 61, supported by the rightframe plate 662 (Fig. l), and is held within defined limits of motion bypin 66 (Fig. 15), secured on the rear. of key 26 and moving in a slot 66in frame plate 662. Pivotally mounted on that portion of pin 66projecting to the right of frame plate 662 is a link 16 connected at itsrear end to the pawl 46 by a slot 12 engaging a pin projecting from pawl46 so that, by pressing down on the tip of key 26 the pawl 46 will bedisengaged from ratchet 46. However, if the key coupler is raisedsufllciently a fin I3 projecting therefrom engages a stud 14 on therelease key lever, preventing the release key from being moved. A spring16 keeps the release key in the raised or normal position when not inuse.

Difierential mechanism 'of cents differentially settable member: and

the cent" keys control the unit of cents" differentially settablemember. The II clerks key and the "paid out" and no sale transactionkeys each have a differentially settable member for operating the detailprinting wheels which otherwise would be positioned to print a "cashtransaction by the 1" clerk.

Fig. 2, representing the tens of cents differential elements, will serveto illustrate the differential mechanism for all the key banks.

The key lever 21 has a cam slot 41, open at the top end, so located andshaped as to be adapted to engage a universal bar 46 mounted on thelower extending arm of the ten of cents differentially settable member49. As the front end of the key lever 21 is depressed, causing acounter-clockwise motion of the key 21 around rod 26, the slot 41 movesthe universal bar 46.

It is the purpose of the cam slot 41 to set the universal bar 46 anddifferentially settable member 49 associated with the ten cent" keybank, according to the tens digit value of the key depressed. Toaccomplish this result the cam slots are graduated so that the key of alower value rocks the universal bar 46 less than the key of a highervalue. Thus the 10 key moves the bar 48 one step,'the key moves the bar46 two steps, the 30 key moves the bar 46 three steps, etc. Thegraduations of a portion of the cam slots are illustrateddiagrammatically by the dotted lines 66 in Fig. 2. The differentiallysettable member 46 is pivoted on a cross member 6|, and is provided witha forwardly extending arm 62 terminating in a toe, and a rearwardlyextending arcuate arm 63 hearing teeth which mesh with a pinion 66fastened on a transmission shaft 66 representing the ten cent? bank ofkeys. Shaft 66 is Journaled in forwardly extending flanges of the rearframe plate 663. differentially set the shaft 66 and through it set the"tens printing detail wheel and the "tens printing totalizer wheels ashereinafter described.

The other key banks are similar to the ten cent key bank except for thenumber of keys,

' each key bank controlling the movement of a .shown in Fig. 2, as anexample, the universal bar 46 and the differentially settable member 46are moved, as a key is depressed, in a clockwise manner about the crossmember 6|. The amount of this angular movement is proportional to thetens digit value of the key depressed so that, upon completion of thefirst half of the operative cycle of the machine, the diiferentiallysettable member 46 is moved to a position in accordance with the tensdigit value of the key depressed.

The toe of arm 62 is adapted to be engaged by a pawl 60, when no key ofthe bank hasbeen depressed, so as to lock the differentially settablemember 46 against chance movement. The pawl 66 is rockably mounted onrod 29 and has a bail 6| extending under all the keys of the key bank.By this'arrangement, depression of any key in the bank will rock thepawl counterclockwise unlatching the member 46. Aspring 62 constantlytends to rock the pawl 66, clockwise to locking position, which eventoccurs as soon as all the keys in the key bank are in normal position.Each bank of differentially settable members is supplied with a similarlatch.

Because the differentially settable member 46 and the differentiallysettable members representing the other key banks are not aligned withthe printing wheels and printing totalizer wheels 66 before mentioned,is driven by the differentially settable member 46 and the other ofwhich, pinion 63, drives a toothed segment 64 (Figs. 1, 2, and 3)rotatably mounted on cross member 6 The segment 64 drives the tensprinting detail wheel 66, the tens printing wheel 66 of the 1" totalizerprinter, and the tens printing wheel 61 of the II totalizer printer.Each of the printing wheels 66, 66, and 61 has hubbed to it a piniontoothed to mesh with segment 64.

There is a lateral transmission means, such as has been described,between each key bank and the corresponding printing wheels, there beingfive transmission shafts similar to shaft 56 provided for this purpose,so that the differential setting for each key bank is individuallytransmitted to the printing wheel and printing totalizer wheelsrepresenting it,

All of the above described diiferential mechanism is old in the art, andis described herein to show one method by which the hereinafterdescribed printing wheels and totalizer printing The purpose of themember 46 is to wheels can be differentially controlled.

Frame for supporting detail printing wheels and I printing totalizerwheels Mounted 'on cross member 6| and shaft 11 (Figs. 1 and 10) are aright printing wheel support frame plate 16 and a left printing wheelsupport frame plate 19 (Figs. 1, 4, 10, and 11) spaced by a supportingrod 60 (Figs. 4 and 10).

The plates 18 and I9 are secured to flanges projecting from the rearframe plate 003, the fastening 8| of the right frame plate being shownin Fig. 10.

Detail printing wheels On the left side of right frame'plate 18 isfastened an offset plate 82 (Fig. 10) which supports the right end ofthe detail printing wheel shaft 83. The plate 82 is offset from frameplate 18 to allow clearance for reset lever I93. The left end of thedetail printing wheel shaft 83 is secured in the left frame plate 18(Fig. 1). The printing wheels are rotatably mounted on the shaft in theorder in which the key banks are arranged. The amount printing wheelsrepresenting amount banks are set so each normally presents the symbol"0 to the printing line. The transaction printing wheel normallypresents a to the printing line and the clerks printing wheel normallypresents a "1 to the printing line. Each of the detail printing wheelsis in constant mesh, by means of a hubbed pinion, with its actuatingsegment 64 and as a consequence the record strip printing is timed totake place at mid-cycle when the key coupler is at the top of itsmovement, as at that time the detail printing wheels present the dataentered into the register. In the last half of the cycle of operationthe printing wheels are returned to normal as the keys are returned bythe key coupler.

Total printing wheels For each clerks key there is provided a set ofamount printing totalizer wheels differentially settable by the samesegments as the amount printing detail printing wheels. The segments arenormally out of engagement with said totalizer wheels. During the firsthalf of the cycle of operation the totalizer selected, by depressing aclerk's key, is engaged with the actuating segments and is disengagedtherefrom during the last half of the cycle of operation as the segmentsare returned to home position. This results in the data entered into thetotalizers being retained.

Tens carrying transfer mechanism is provided for in the totalizerssimilar to that shown in United States Patent No. 1,793,795. issued toCharles W. Green. As this forms no part of the invention, and as anytransfer mechanism may be used in connection with said printingtotalizers, no further disclosure is necessary.

Overflow wheels 84 (Fig. 1) on the printing totalizers are provided'toaccumulate and print amounts in excess of the amount that may be enteredat one operation such as shown by the last two entries shown in Fig. 5,

The first four entries on the detail strip shown in Fig. 5, representtransactions printed by the detail printing wheels mounted on shaft 83(Figs. 2 and 3). The clerks" symbol wheel is differentially setaccording to the key I or II depressed as also is the transaction symbolwheelin the same manner as the number wheels are set, except theactuating segments are shortened so as not to engage the overflow wheelsof the totalizers with which they are alined. The last two of the sampleentries are total printings from the 1" and 11" printing totalizersrespectively. The symbols 1 and 11" (Fig. 1) are engraved on the framesof the respective printer totalizers as shown in Fig. 1, and are alwaysprinted with the printing of the total on the associated totalizer.

It is evident that an impression from the detail printing wheelsrequires the platen to carry the strip against five type wheels, whereasin taking an impression from either of the totalizers the platen mustcarry the strip against seven type wheels, thus decreasing the forcewith which each character is struck unless increased power is furnishedthe hammer on total printing operations. Provision has therefore beenmade for causing a harder blow to be struck by the hammer when a totalprinting operation occurs, insuring uniform printing. The mechanism foradjusting the printing hammer blows automatically will be discussed indetail hereinafter.

Totalizer engaging means The totalizer shafts 8i and 00 (Figs. 10 and19) are supported in frames 400 and 40| (Figs. 1 and 10) respectively,each of said frames being pivotally mounted between the printing wheelsupport plates 10 and 19 before mentioned. As viewed in Fig. 10, aclockwise rocking of the frames 400 and 40| around centers 390 and I"will engage their respective totalizers with the differentially drivensegments 64 (Fig. 1).

Totalizer engaging means has been provided to rock the frame 400 on eachmachine operation unless the II clerks key is depressed in which eventthe I totalizer is held from engaging and the II totalizer is forced toengage. A special disabling mechanism has been provided for keeping bothtotalizers from engaging if either the "paid out or no sale" keys aredepressed.

Referring to Fig. 19, the main drive shaft 00 has secured thereto a cam403 which rotates once each machine operation and rocks a lever 404,pivotally mounted on cross member ll, first counter-clockwise thenclockwise. Studs 40! and 406 carried by lever 404 ngage bifurcations inlevers 401 and 400 respectively. Levers 401 and 408 ar pivotally mountedon pawls 409 and 4|0 which in turn are pivotally mounted on printingwheel support frame plate 10 by studs 4 and 4|2 respectively.

On a plate 3 (Fig. 20), which is pivotally mounted on cross member 5 Iare a cam lever 4|4 for engaging the "I" totalizer, and a similar camlever 4|! for engaging the "11 totalizer pivotally mounted on said plateby studs 4|0 and 4|'| respectively. A counter-clockwise movement oflevers 4 or 4|! around their respective pivots will engage theassociated totalizer.

A selector plate 4|0 (Fig. 19) is rockably mounted on cross member SIand has a downwardly extending arm 4|! having a cam slot 420 engaging astud 42| fastened to-the 11" clerk's key. As the "II" clerk's keyisdepressed plate 4|! is rocked clockwise. On the forward edge of plate4|! are a series of notches so arranged that in the normal positionshown in Fig. 19 a high place is opposite totalizer shaft and anotherhlgh place is in front of the lower arm of pawl 40!. thus preventing theengagement of the II totalizer and preventing the rocking of pawl 409around 'pivot 4. with the selector plate 4|0 in the same position, pawl4|0 is permitted to pivot around center 2, and shaft 08 is blocked by ahigh place on the notched edge. When the plate 4" is rocked clockwisedue to depressing the "11 clerk's key shaft 05 is blocked by a highplace, shaft 08 is unblocked, pawl 400 is permitted to pivot aroundcenter 4 and pawl 4|0 is prevented from pivoting around center 4.

Referring to the totalizer shaft 05, as shown in Fig. 19, when ,lever404 is rocked by a machine operation stud 405 rocks lever 401 clockwise.Such movement of lever 401 will, because the lower arm of lever 403 isblocked from moving, be around stud 422 as a center, causing theshoulder in cam slot 423 to force stud 424 (Figs. 19 and 20) downwardly,rocking lever 4 counterclockwise, which engages the "I" totalizer. Atthe same time stud 403 (Fig. 19) moves lever 408 clockwise, but becausethe lower arm of pawl is free to move, pawl 4I0 moves counterclockwisearound pivot 4I2 and stud 425 rides freeLv in slot 423.. when plate 8 isshifted, by

depressing the If clerk's key, the opposite result occurs, totalizer "1.being held out of engagement and totalizer "II" being forced intoengagement.

Means is provided to prevent either one of the totalizers from engagingduring a paid out" or no sale transaction. If either of these keys isdepressed a stud 421 (Fig. 20) fastened thereto moves a lever 428. Thepaid out" key moves lever 420 counter-clockwise and the "no sale keymoves lever 428 clockwise. This is accomplished by having two legs tolever 428 each leg associated with and having a cam slot cooperatingwith the stud of one of the two mentioned keys. By furnishing a shoulder423 ,on the leg cooperating with the no sale" key, and a shoulder 430 onthe leg cooperating with the paid out" key, the lever 428 is locked inthe position shown in Fig. 20 when no key 25 is depressed, but when oneor the other of the keys 25 is depressed the lever 428 is enabled tomove in one direction or the other. Lever 428 has a cam slot 43I at itsupper end which cooperates with a stud 432 secured to one end of a lever433 pivoted on stud 434 projecting from the frame plate 13. Slot 43I isso shaped that movement in either direction from the center rocks lever433 counter-' clockwise. The forward end of lever 433 has a bifurcation435 engaging a stud 433 carried by an arm 431 (Figs. 19 and 20)pivotally mounted on plate 4I3. Stud 438 engages a slot'438 (Fig. 20) atall times, and engages slot 433 (Fig. 19) when lever 433 is rocked bydepressing the "paid out or "no sale? key. When slots 438 and.,433 areboth engaged by the stud 436. plate 3 is made tomove with lever 404 oneach machine'operation changing the position of pivot points 4I8 and 4"(Fig. 20) with reference to the action of levers 401 and 408 (Fig. 19)so that both totalizers are disabled, the motion of lever 404 beingidle. v

Printer jr'ame Rockably mounted on cross member 5| (Figs. 1, 2, 3 and 8)by claws I05 (Figs. 4 and 8) is the printer frame consisting of a rightframe plate I 00 (Figs. 2 and 8) and a. left frame plate IOI (Figs. 1and 4) spaced and secured by'rods I02, I03, and I04 (Fig. 4) so as toform a supporting frame for the printing mechanism to be described. I Ig In normal position the center of gravity of the printer frame and themechanism it supports is to the rearof and above cross member 5I,causing the frame to stay rocked rearwardly where it is supported on aportion of the rear frame plate 303 (Figs. 2. 4, and 8) positioned forthat purpose.

In printing transaction data, from the .detail In printing transactionsfrom either the 1" or "II" totalizer printing wheels, the printer frameis rocked forward to either one of two positions. determined by stops,so as to position the platen III to take an impression from the "I"totalizer printer wheels or the 11" totaliaer printer wheels, asselected by manipulative means to be hereinafter described.

Record strip Arm I03 (Fig. 7), pivotally supported on a stud 33projecting from the left printer frame IN, is kept from movement byengagement of claw IIO with frame supported stud 38 and the engagementof spring held pawl 31 (Figs. 4 and 17) with stud 36. Pivotally mountedon arm I03 by means of stud I20 is a lever IIO. Stud I20 also hasmounted thereon a paper storage spool II8. Projecting from the lower armof lever H8 is a stud I08 having rotatably mounted thereon a rollerspindle I01 holding a supply roll of paper. The unused paper istransported from spindle I01 over rod I03 (Fig. 8) thence over rod II4,thence around the platen II5, over rods H4 and I03, thence under rollerII2 (Fig. 1) mounted on a stud I I3 on arm I33, thence over roller II1mounted on stud Ill projecting from the upper arm of lever III to thestorage about He. A spring tensioned ball I22 keeps the paper strip tautby pressing against the supply roll. It is evident that the rocking ofarm II8 on (Fig. 7). rocks counter-clockwise, the spool -IIO turns withit until a notch in ratchet wheel I24 hubbed to the spool encounterspawl I23 which stops the spool tur At thispoint, the furthercounter-clockwise rocking of lever 3 by the machine causes the paperstrip I08 to wind one step on the spool, which winding is complete atthe end of the first half of the machine operation.

lever II8, pawl I23 engages ratchet I24 and causes the spool III torotate with the armto rest position.

A lever I21 pivotally mounted on stud II3' extending from arm I 03,whose angular movement is limited by a stud I28 extending into slot I23,has pivoted at its lower end a pawl I30 engaging ratchet wheel I24.Rearwardmovement of the upper end of lever I21 causes the pawl I30 toengage the ratchet I24 after a free movement equivalent to that allowedby pawl I23, before mentioned.

' The record strip may thus be transported one step at a time bymanipulation of the upper end of lever I21 which in no way involvesmovement of lever II8.

I30 inv contact with the ratchet. Spring I3I reprinting wheels onto therecord strip the printer turns lever I21 to home position after it hasbeen pushed rearwardly. 2 v

As has been described, thedrive shaft 38 (Fig;- 4) makes one rotation inthe direction of the arrow during each machine operation; Cam I32-secured to drive shaft has. a face groove-"I33 engaging a roller studI34 extending from lever On the return or clockwise rocking of' SpringI25 holds pawls I23 and I I35 which is pinned to a shaft I36 journaledin the right and left frame plates I and IN of the printer (Figs. 4 and8). Immediately to the left of the right frame plate I00 is a lever I31(Fig; 8) also pinned to shaft I36. Lever I (Fig. 4) drives the recordstrip mechanism through stud I36 (Fig. 4) fastened on lever H8 anddrives the left ribbon transporting mechanism through stud I36. On eachmachine operation cam I32 is rotated once, which rocks lever I35clockwise as, viewed in Fig. 4, on the first half of the cycle andcounter-clockwise during the second half of the cycle. This rockingmotion serves to advance the record strip by rocking lever II6 as hasbeen described in addition totransporting .the record strip from readingposition to printing position and thence back to reading position.

on total printing operations, inasmuch as no operation of the keys isnecessary, the shaft 36 will not be rotated. To rock lever I35 (Fig. 4)on total printing operations to cause the record strip to advance astep,-the shaft I36 is rocked by lever I31 (Fig. 8) in a manner to bedescribed in connection with total printing.

' Ribbon mechanism and spool 64 (Fig. 1'1) being constantly driven inone direction by pawl I40 (Figs. 4 and 1'1) turning ratchet wheel I46one step each machine operation. Pawl I40, pivotally mounted on stud Icarried by bell crank lever I42, is held in contact with ratchet wheelI46 by spring I41. Bell crank lever I42 pivotally mounted on stud I43,projecting from frame plate IN, is rocked counter-clockwise and thenclockwise each printing operation by stud I36 and slot I44 connectionwith lever I35. The ratchet I46 is secured on spindle I and the spool64' is frictionally carried on'the said spindle so as to be normallyturned therewith but subject to be turned contrary to the motion ofspindle I by a force pulling the ribbon in the opposite direction.

The right spool 63 (Fig. 1) is loosely mounted on a spindle I46 (Figs.'1 and 2) which also has loosely mounted thereon a ratchet I50 (Fig. 2).The right spool is engaged with the ratchet I50 by a pin 63 so the twomove together. The ratchet I50 is movable in either direction by adouble acting pawl I46 actuated by link I5I. The left spool tending towind constantly in one direction takes up the ribbon if the right spoolis unwinding but does not prevent the right spool from winding againstthe take up motion, as under such circumstance the frictional mountingof the left spool will allow slippage.

' Ratchet I50 is driven by a pawl I46 actuated by link I5I which isoscillated first downwardly and then upwardly each machine operationthrough lever I53 pivotally mounted on frame plate I00 which lever isoscillated through stud I55 travelling in slot I54, said stud beingmounted on the lever I31 before mentioned as moving forward and backwardeach printin O ration.

Means for automatically determining in which direction the ribbon shallmove is disclosed fully in the United States Patent No. 1,628,164,issued to w. E. Lippert to which reference is made.

Printing hammer and platen 0n the left side of the right frame plate I00of the printer (Fig. 8) is a stud I6I on which is pivotally mounted aprinting hammer I62. having a normal position in which it rests on theupper edge of the horizontal arm of a bell crank lever I63 which is alsopivotally mounted on stud I6I, Bell crank lever I63 and the printinghammer not being in the same plane the forward or striking portion ofthe hammer has welded to it an extra width of metal to bring it into theplane of bell-crank I63 upon which it rests, said extra width of metalserving the additional purpose of weighting the hammer. Bell crank leverI63 is urged normally counter-clockwise by springs I64 and I65 against aportion of frame I00, an offset bearing edge I66 being provided on thedownwardly extending arm of bell crank I63 for that purpose. Bell crankI63 thus may be turned clockwise only, against the force of springs I64and I65. This movement of bell crank lever I63 occurs each machineoperation through a cam I61 secured on drive shaft 36 which engages aroller stud I66 on the bell crank lever I63, forcing it clockwise. Atapproximately the middle of the operating cycle the cam I61 presents anabrupt break allowing the springs I64 and I65 to pull the bell cranklever I63 sharply counter-clockwise to its stopping point. Hammer I63 islikewise carried counter-clockwise but continues moving under its ownmomentum after bell crank lever I63 has been stopped.

Platen II5 (Fig. 8) is mounted in a frame I66 pivotally mounted on rodII4 journaled in the printer frames I00 and I0 I. Clutched by a tongueand groove connection to the frame I66 is a rearwardly extending arm I10(Figs. 1 and 8) the under side of the rear end of which is adapted to bestruck by the hammer I63 causing the platen to carry the record stripagainst the printing wheels. The forward end of arm I10 has a thumbpiece by which the arm may be moved on rod II4 to the right, unclutchingthe frame I66. The thumb piece is normally held to the left in whichposition frame I66 and arm I10 move as a unit.

Attached on the inside of printer frame I06 is a shield I60 (Figs. 1 and8) preventing the operatorv from holding the rear end of arm I10 so asto be unaffected by the hammer blow.

Spring I1I normally holds the platen slightly away from the printingwheels by holding the rear end of arm I16 against stud I12. A bent overportion I13 of lever I31 locks the platen against printing movementunless lever I31 has been rocked in a printing operation.

Total printing As the cam I61 only rotates during a machine operationother means is provided for actuating the hammer in total printingoperations which involve no rotation of shaft 36.

When lever I31 (Fig. 8) is manually rocked clockwise shoulder I14engages pawl I15 pivotally mounted on hammer I62 by stud I16 andnormally held clockwise by a spring against an adjustable screw stop I11causing further clockwise rocking of lever I31 to rock hammer I63clockwise against the action of springs I64 and I65. Due to the distancebetween centers I36 and I6I, the shoulder I14 will eventually slide overpawl I15 allowing the springs I64 and I65 to cause the hammer to strikethe platen a blow. On the return counter-clockwise rocking of lever I 31shoulder I14by-passes pawl I15 by causing it to rock counter-clockwise.

As lever I31 is drawn forward by handle I18, a bracket I9I (Fig. 14)attached thereto is interposed between arm I18 and frameplate I88(Fig. 1) preventing the shifting of arm I18 to the right to disable theplaten.

The platen II5 (Fig. 8) is normally over the detail printer wheels onshaft 83 so as to be in proper position on each machine operation toprint the transaction.

On total taking operations the platen and record material must be movedso as to be over the 1" or the II totalizer. This is accomplished byrocking the printer frame forward around cross-member 5I until theplaten is over the selected totalizer.

If the operator wishes to print from the "I totalizer, lever I31 isgrasped by the handle I18 and drawn forward and downward which rocks theprinter frame and associated parts around cross-member 5I. Stud I19extending from lever I 31 enters cam slot I88 in the right printingwheel support plate 18 which is so shaped that lever I31 is rockedslightly clockwise with relation to the printer frame cooking thehammer, which is released as stud I19 reaches the bottom of the slot,which point also positions the printer frame so the platen will be overthe "1 counter.

If the operator wishes to print from the II counter the printer frame isdrawn forward by the handle I88 which causes stud I19 to enter cam slotI89 in the right printing wheel support plate 18, which allows theprinter to rock for ward until the platen is over the "II counter. Thiscam slot is also formed so as to cook the hammer and release it as studI19 reaches the bottom of the slot. In drawing the printer forward byhandle I18, lever I31 moves slightly before the printer starts, thuscausing stud I19 to enter slot I88 instead of slot I89 which it enterswhen handle I 88 is used.

It is to be noted that the rim of cam I33 (Fig.4) that is adjacent tostud I34 when the parts are at home position, is cut away to allow theprinter to be rocked forward as would be otherwise impossible.

Device preventing incomplete total printing operation One of the novelfeatures of the invention is a device which prevents the printer framefrom being returned to home position after beingdisturbed therefrom,unless a complete total taking operation is performed, causing animpression to be taken from the selected totalizer. This device preventsthe operator from manipulating the printer in such a manner that atotalizer might be reset without animpres'sion of the amount standingthereon being first taken.

Mounted on the left of printer frame I88 (Figs. 8 and 14) are two pawlsI59 and I58 which are pivoted on studs I 6| and I68. These pawls arenormally in the position shown in Fig. 14 when" the printer frame is inhome position, pawl I59 resting against the rear frame plate 383. Whenthe printer frame is rocked forward spring I51 (Fig. 14) tends to rotatethe pawls I59 and,I5 9 each clockwise as seen in Fig. 14 until the rearpart of pawl I58 engages notch I56 in the periphery of pawl I59 whichprevents the printer frame from being returned to home position, as therear end of pawl I59 will then strike the rear frame plate 383 beforethat occurs. During the rocking of the printer frame forward the studI19 (Fig. 8), as explained, will enter either cam slot I88 or I89rocking lever I31 in relation to the printer frame. As such rockingoccurs before pawls I58 and I59 are engaged at notch I56 the stud 9|will be out of the path of pawl I58 as it turns clockwise on stud I68,the notch 98 accommodating stud 9| during the remainder of the firsthalf cycle. Pawls I58 and I 59 remain engaged until the lever I31 hasactuated the printing hammer and until the return movement of lever I31which in by-passing bell crank lever I15, rocks the bell crank lever sothat its upper extending arm strikes the forward'extending part of pawlI58 and holds said pawl from engaging stud 9| as lever I31 moves home.At the same time lever I31 returns to home position, stud 9I holds pawlI58 disengaged from notch I56 and allows the printer frame to bereturned to home position.

Automatic hammer adjustment 7 Due to the fact that printing from thedetail printing wheels involves only five characters and printing fromthe printing wheels of either totalizer involves seven characters,provision has been made for causing the hammer to strike a more forcefulblow when printing a total from the I or the II" totalizer than it doeswhen printing the transactions from the detail printing wheels onregistering operations. This mechanism will now be described.

Springs I64 and I65 are attached at theirrear ends to the bell cranklever I63. The front end of spring I65 is attached to sud I 8I on theright printer frame I88. The front end of spring I64 is attached to studI82 on a lever I83 pivoted on stud I84 extending from the right frameI88 of the printer. Secured to the right side of the right printingwheel support frame 18 is a cam I86 which guides a roller I86- mountedon a downwardly extending arm of lever I83. As the printer frame isrocked forward for total taking the roller I88 travels along cam Istretching spring I64. On total printing operations involving either theI or the "II totalizer the roller reaches the surface I 81 which isarcuate, having cross member 6| as a center, thus causing the hammerblows on the 1" and II totalizer printing wheels to be of the sameforce, which is greater than that exerted on the detail printing wheelsdue to the extra tension in spring I64.

Totalizer resetting mechanism Pivotally mounted on cross-member 5I(Figs. 10, 11, and 12) is a segment shaped resetting lever I93 having atoothed arcuate edge for engaging pinions I94 and I95 (Figs. 10 and 11)secured on the right ends of totalizer shafts 85 and 86 respectively.

and disengaged from the re- Fastened to the left side of the reset-lever,-on.

that part ofthe arcuate edge engaging the pinion I94, is a plate 88 sopositioned that the pinion I94 may engage the lever teeth if the leveris in Shafts 85 and 86 are shiftable laterally so as to allow pinionsI94 and I95 with the action of home position but may not be engagedtherewith or disengaged therefrom if the lever is out of home position.

Totalizer shaft 66 (Fig. 13) has a notch I96 associated with each wheelmounted thereon, each notch being adapted to be engaged by a pawl 266carried by its associated wheel when the shaft is shifted to the rightand the pinion I99 secured thereto is in engagement with the reset leverI99. As the reset lever is pulled down the shaft 96 is rotated andnotches I96 cooperating with pawls 266 carry displaced wheels to zeroposition. As the shaft 66 is shifted to the left to disengage pinion I99from the reset lever, the pawls 266 are disengaged from the notches andthe totalizer wheel may be set by the differential without interference,as the pawls 266 ride the periphery of the shaft. The totalizer on shaft66 (Fig. 12) is reset in the same manner. The totalizer resettingmechanism is old in the art and reference is made to United StatesPatent No. 1,874,277, issued to Fuller, if further description isdesired.

The totalizers mounted on shafts 66 and 96 are reset by the samesegment, but only one may be reset at a time, and before one may bereset an impression must be taken therefrom.

Totalizer selection for resetting As before stated, as a total printingoperation is performed the stud "9 (Fig. 8) enters either cam slot I60or cam slot .I99 depending on whether the printing is to be from the 1"totali zer, or the 11" totalizer.

Pivotally mounted on cross-member 6| (Figs. 10 and 11) between rightprinting wheel frame plate I6 (Fig. 11) and the right printer frameplate I06, is a cam plate 266 (Figs. 10 and 11) associated with the 1"totalizer shaft 96 and a cam plate 266 associated with the "If" printingtotalizer shaft 66. On the right end of printer shafts 66 and 66 aresecured collars 261 and 269 (Fig. 11) each having a peripheral groove toaccommodate the forward end of its associated cam. As seen in Fig. 10the pivotal movement of each of the plates 265 and 266 is limited, theupward movement of each plate being limited by a forward extending toeencountering the peripheral groove in its associated collar 2'66 and 269and its downward movement being limited by the low portion of a lockingcam 269 on shaft 11 beforementioned. If the high portion of cam 269 ispositioned as shownin Fig. 10 each plate is held in the extreme upwardposition. If the high portion of the cam 269 is positioned elsewhere thecam plates may move downwardly until they strike the low part of cam269. In their uppermost position cam plates 266 and 296 hold the shafts96 and 99 to the extreme left as shown in Fig. 11 so that pinions I99and I96 are not engaged with reset lever I99. This is the lockedposition during which neither printing totalizer may be reset. If eithercam plate 266 or 269 is moved downwardly the associated shaft 96 or 99would be shifted to the right and the printing totalizer shaft andpinion would be moved in position to be reset by moving lever handle I91downwardly.

Means has been provided, if the high part of cam 269 is in ineffectiveposition, to make certain that only one of cams 266 and 266 be in resetposition at a given instant. This consists of a coupling lever 2I6 (Fig.10) mounted pivotally on a stud 2 extending from the right printingwheel frame plate I6. Studs 2I2 and 2I9 projecting from either end oflever 2I9 en- 76 gage hooked portions of cam plates 266 and 266 so thatif cam plate 266 is rocked down, lever 2I6 is rocked counter-clockwiseforcing stud 2I9 against cam plate 296 forcing it to its upper osition.In this position of cams 266 and 266 actuation of resetting lever I'99will reset the I totalizer. Conversely, if cam plate 266 is rocked down,lever 2I9 is rocked clockwise forcing stud 2I2 against cam plate 266,forcing it to its upper position, whereupon actuation of resetting leverI99 will reset the "II" totalizer printer but not the 1" totalizerprinter.

The aforementioned stud I19 (Fig. 9) enters slot I96 (Figs. 8 and 10)when an impression is taken from the "I" totalizer and at the same timestrikes the upper extending arm 2I9 (Fig. 10) of cam plate 266 rockingplate 266 downwardly so that the "I totalizer shaft is shifted so as tobe reset, and the "II" totalizer shaft is held in position wher itcannot be reset. The converse is true when an impression is taken fromthe II totalizer. Cam plate 266 will be rocked downwardly as stud I79travelling in cam slot I69 encounters arm 2I6 forcing the 11" totalizerinto engagement with the reset lever and forcing the "I" totalizer outof engagement therewith. Plates 206 and 266 are reset and locked in homeposition, shown in Fig. 10, by the high portion of cam 269 when'shaft I1is positioned so by control lever 226 (Fig. 9), as will be explained.

By this mechanism the operator of the machine is forced to take animpression from a totalizer before it can be positioned to be reset.This interlock is one of the novel features of applicant's invention.The mechanism, heretofore described, for forcing a full printingoperagioosn assures the full operation of cams 296 and Lock preventingprinting while resetting Resting by means of claws on cross-member 6I(Fig. 12) is a locking plate 2I6 supported and kept from angularmovement around center 6| by a stud 2" (Figs. 10 and 12) extending fromthe right printing wheel frame plate 19 and engaging an elongated slot2I6 in said plate 2I6. A slot 2I9 in plate 2I6 accommodates a stud 262extending from resetting lever I99, said slot being shaped so that theslightest movement of reset lever I99 from normal position forceslocking plate 2I6 radially outward from crossmember M as a center,causing shoulder 226 on plate 2I6 to be moved into notch 22I in shaftI96, thus preventing the printer frame from being rocked forward whenthe reset lever is out of home position.

A full stroke mechanism for the reset segment is shown in Fig. 16 whichis like that described in United States Letters Patent No. 1,870,004,issued to Charles W. Green, to which patent reference has before beenmade. This full stroke mechanism is for the purpose of enforcing acompleted operation of the reset plate and the consequent setting of thetotalizer involved to zero.

Resetting lever I99 has pivoted thereto a looking pawl 260 (Fig. 16)normally bearing against the under side of a square stud 26I projectingfrom the right printing wheel frame plate 16. Spring 262 compressedbetween the upper extending arm of pawl 266 and the lower extending armof a pawl 269, also pivoted on reset lever I99, will cause toe 269 tosnap up against proiection 269 on pawl 269, as reset lever I99 is pulledforward. Attempts to return segment plate I 93 to home position fail asthe tripped toe 254 hits the forward side of stud 25! unless the leverI93 is completely operated, under which circumstances the heel 256strikes stud 251 and cooks the toe 254 under the end 258 so it may passunder stud 2-5I on the return of lever I93 to home position. Asprojection 255 hits stud 25I the parts assume their original position.

On shaft 11 (Fig. 12) is a locking cam 222 (Fig. 12) which preventsreset lever I 93 from being moved unless the cut away edge 223 ispositioned so as to pass the toe 224, which would otherwise hit theportion of the periphery of cam 222 that has not been cut away. The samecam 222 is prevented from turning and therefore the shaft 11 is lockedagainst rotation, if reset lever I93 is displaced from home position asarcuate edge 234 engages the cutaway periphery 223.

Printer frame lock To normally prevent the printer frame from beingrocked to cause a total printing operation, a pawl 259 (Fig. 17)pivotally mounted on a stud 260 projecting inwardly from the left frameplate 31, is normally positioned to engage a square stud 26| on the leftprinter frame plate It". Pawl 259 is positioned by a cam 262, secured onshaft 11. which cam has a slot 263 engaging a stud 264 projecting frompawl 259. Cam slot 263 is so formed that pawl 259 engages stud 26Iexcept when the control lever, to be described, turns shaft 11 toposition for resetting and total taking.

Control lever Shaft 11 (Fig. 9), on which are mounted the cams 222, 209,and 262, is manually controlledby means of lever 225 pivotally mountedon stud 226 extending from the left frame plate MI. The rear end oflever 225 has an arcuate surface having teeth 221 which mesh with pinion228 secured on shaft 11. Lever 225 may be moved by hand and locked inany of a plurality of positions, indicated by the lines radial to stud226, allowing or preventing certain functions of the machine. Theposition of the lever in Fig. 9 indicated by radial line 229 through thecenter of a lock 230, shows the position in which it is impossible toprint a total or reset a totallzer inasmuch as cams 209, 262, and 222(Fig. 17) are in effective position to lock their respective parts ashas been described.

By setting lever 225 (Fig. 9) to the position indicated by radial line23I, cams 209 and 262 are rendered ineffective to lock their associatedmechanisms and a total may be printed. By setting lever 225 to theposition indicated by radial line 232, locking cam 222 will bepositioned so the reset lever I93 is free to be moved, enabling a totalprinting and resetting operation.

Cabinet totalizers reset, the ribbon changed, and therecord stripremoved and replaced by rocking the arm I09 (Fig. 7) forward by pawl 91(Figs. -4 and 17) which unlatches the record strip storage unit fromstud 96. The lid 266 also gives access to special counters 269 (Fig.1'1) usually ing the number of different classes of machine operations.The cabinet and printer are so fitted that withthe cooperation of theinterlocks heretofore described, the operator who has access to theprinter through the lid 266 cannot manipulate the totalizers and printerso as to record a false total.

By locking the control lever so that a total printing or resetting isprevented the access to the printer through the lid will only permit theoperator to change the record strip and ribbon.

As the manually operated record strip advancing lever I21 (Figs. 4 and17) is inaccessible when the lid 266 is closed, means is providedwhereby the operator may manipulate said lever from outside the cabinet.A link 216 (Fig. 17) slidably mounted between the underside of the lidand stud 21I mounted on a bracket secured to the lid, has a thumb piece212 projecting through a slot 213 in said lid. Spring 214 keeps the linknormally in the position shown in Fig. 17 so that a rearward movementgiven by the operator will rock lever 215, with which link 216 ispivotally connected, in a clockwise movement around stud 3III fastenedto the cabinet. Lever 215 has a from beneath the double latches, theleft latch 218 being illustrated.

Provision has been made for automatically unlatching the lid when thecontrol lever 225 is moved to the position for total taking andresetting. Stud 219 on the lever 225 (Fig. 9) is adapted to engage a camslot 260 (Figs. 9 and 18) on a lever 26I mounted pivotally on specialcounter support frame 282 (Fig. 17). Downward movement of stud 219,carried by the control lever in moving to total taking position, causesthe lever 26I to be rocked counter-clockwise as viewed in Fig. 18 sothat its upper end strikes lever 263 secured to shaft 284 on which thelatches 218 are secured, rocking said latches away from the bolt andunlocking the lid.

The lid is supplied with viewing and writing apertures through which thelast several transactions as recorded on the detail strip may beOrrzssrron To register transactions on the machine it is necessary tohave the control lever set for the operation desired, in which positionit may be locked.

In the event it is desired to allow the clerk access to the record stripby supplying him with a key to the lid but denying him a key to thecontrol lever, the record strip or ribbon may be removed or replaced buta total may not be recorded or atotalizer reset as such operationsrequire manipulation of the control lever.

If the clerk is allowed to manipulate the control lever and to open thelid, a total may be taken from either totalizer, and the record stripremoved and replaced. Due to the interlocks described, the impressionmeans must be first operated before the totalizer in question can bereset.

In taking a total the operator chooses handleprinter forwardly and thenback to home positlon.

A totalizer may not be reset unless an impression has been taken but itis not necessary to reset the totalizer after every total impressionoperation. No impression may be taken from a totalizer while a resettingis in progress.

While the form of mechanism herein shown and described is admirablyadapted to fulfill the objects primarily stated, it is to be understoodthat it is not intended to confine the invention to the one form orembodiment herein disclosed, for it is susceptible of embodiment invarious forms all coming within the scope of the claims which follow.

What is claimed is:

1. In a machine of the classdescribed, having a plurality of groups ofprinting wheels, the

combination of impression means including a platen normally opposite acertain one of said groups of printing wheels but movable to a 1position opposite another one of said groups of printing wheels; aprinting hammer for operating said platen; a spring normally operable toactuate said hammer to operate the platen with a predetermined force totake an impression from the wheels which may be opposite the platen;means for moving the platen opposite said other group of wheels; andmeans operated by said moving means to apply an additional tension tosaid spring to cause the platen to be actuated with greater force in itsmoved position than in its normal position.

2. In a machine of the class described, the combination of a pluralityof groups of type wheels; aplaten; a platen actuating means in-' cludinga plurality of springs; a frame for holding record material and theplaten normally opposite one group of type wheels but movable to placethe platen and the record material selectively opposite other of thegroups of type wheels so that an impression may be taken from anyselected one of the groups of type wheels; a cam; and a cam followercarried by said frame and connected to one of said platen actuatingsprings, said cam follower being actuated by the cam when the frame ismoved from normal position and operating to apply additional tension tosaid one platen operating spring, whereby said platen actuating meanswill actuate the platen with more force when the frame is in its movedposition than when the frame is in its normal position.

3. In a printing mechanism for a cash register, the combination ofimpression means including a platen for carrying a record strip and ahammer for actuating the platen; a spring for actuating the hammer,which spring is tensioned by being stretched a predetermined distanceafter which the spring is released suddenly to actuate the hammer toeffect a sharp blow on the spring farther and apply additional tensionto the spring when the second operating means is operating to stretchthe spring said predetermined distance whereby the hammer and the platenactuated thereby will operate with a' greater force when the secondoperating means is used than when the first operating means is used.

- 4. In a machine of the class described having a platen to takeimpressions from type wheels, and means for operating the platento'cause an impression to be made, the combination of a spring foractuating the operating means; a machine-operated means for applying apredetermined tension to the spring; manual means for applying saidpredetermined tension to the spring; and means actuated by the manualmeans to stretch the spring and apply additional tension vto the-springwhereby the spring is tensioned more by the manual means than by themachineoperated means. 1

5. In a machine of the class described having a plurality of groups oftype wheels and one impression means movable to positions opposite thegroups of type wheels to take impressions selectively from any group ofthe plurality of groups of type wheels, said impression means includinga platen for carrying a record strip, and a hammer means for actuatingthe platen to take an impression by carrying such record strip againstthe selected group of type wheels, the combination of a spring foractuating the hammer means, which spring is tensioned by being stretcheda predetermined distance after which the spring is released suddenly toactuate the hammer to efiect a sharp blow on the platen and cause animpression to be made; machine-operated means for-stretching said springsaid predetermined distance to tension the spring to take an impressionfrom a certain group of type wheels; manual means for moving theimpression means selectively opposite other groups of type wheels andfor stretching said spring said predetermined distance to tension thespring to take an impression from the selected group of type wheels; acam; and a cam follower coupled to the spring and actuated by the manualmeans to cooperate with the cam and stretch the spring to applyadditional tension to the spring to cause the platen to be operated withmore force when taking an impression from other of said groups of typewheels than when taking an impression from said certain group of typewheels.

DANIEL K. HUGHES.

